Queen have covered a bunch of songs live. I'd say more than enough. These are my favorites (feel free to post your too!)
Immigrant Song
Saturday Night's Alright For Fighting
Tutti Frutti
Tavaszi szél vizet áraszt
Imagine
I Feel Fine
Big Spender and Tutti Frutti are probably their best imo. Big Spender has such a good groove, and is much more raucous than the original recording. Tutti Frutti works really well with the three part harmony and the first half done acoustically.